377 research outputs found

    College Dating Violence: Evaluating an Online Intervention

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    The purpose of this study will be to replicate and extend a randomized controlled trial that tested the effectiveness of an online bystander intervention educational program (STOP Dating Violence; O'Brien, Sauber, Kearney, Venaglia, & Lemay, 2019). Specifically, the intervention was modified and converted into an engaging animated video and then tested for its effectiveness. College students will be randomly assigned to one of three conditions: (1) the STOP intervention, (2) a website containing information about dating violence, and (3) a control condition. Data collection is currently underway. Preliminary data analyses (N=39) suggest that there is a difference in post test scores on the knowledge of bystander interventions measure across conditions (F(2, 36) = 3.876, p <; .03, η 2 = .18). This study will advance knowledge regarding how counseling psychologists might cost-effectively and successfully educate undergraduates about dating violence

    Biologic Agents—A Panacea for Inflammatory Arthritis or Not?

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    Aim. To describe the retention rates for biological therapies in patients with rheumatoid arthritis (RA), psoriatic arthritis (PsA), and ankylosing spondylitis (AS) in a clinical setting. Methods. All patients managed in a dedicated biological therapy clinic in a teaching hospital in Australia were assessed for continuation on biological treatments and reasons for switching to an alternative biological agent or cessation of treatment. Results. There was a lower retention rate for RA patients on biological therapies compared to PsA and AS patients and the retention rate for RA patients was lower than that reported in RCTs. Conclusions. The retention rate on biological therapies for RA patients was lower in the clinic setting than what is reported in RCTs. The reasons for the lower retention rate in the clinical setting are discussed but no clear determinants for nonresponse to biological agents were identifiable. These agents have very limited steroid sparing effects

    Evidence for Nonlinear X-ray Variability from the Broad-line Radio Galaxy 3C 390.3

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    We present analysis of the light curve from the ROSAT HRI monitoring observations of the broad-line radio galaxy 3C 390.3. Observed every three days for about 9 months, this is the first well sampled X-ray light curve on these time scales. The flares and quiescent periods in the light curve suggest that the variability is nonlinear, and a statistical test yields a detection with >6 sigma confidence. The structure function has a steep slope ~0.7, while the periodogram is much steeper with a slope ~2.6, with the difference partially due to a linear trend in the data. The non-stationary character of the light curve could be evidence that the variability power spectrum has not turned over to low frequencies, or it could be an essential part of the nonlinear process. Evidence for X-ray reprocessing suggests that the X-ray emission is not from the compact radio jet, and the reduced variability before and after flares suggests there cannot be two components contributing to the X-ray short term variability. Thus, these results cannot be explained easily by simple models for AGN variability, including shot noise which may be associated with flares in disk-corona models or active regions on a rotating disk, because in those models the events are independent and the variability is therefore linear. The character of the variability is similar to that seen in Cygnus X-1, which has been explained by a reservoir or self-organized criticality model. Inherently nonlinear, this model can reproduce the reduced variability before and after large flares and the steep PDS seen generally from AGN. The 3C 390.3 light curve presented here is the first support for such models to explain AGN variability on intermediate time scales from a few days to months.Comment: 10 pages using (AASTeX) aaspp4.sty and 3 Postscript figures. Astrophysical Journal Letters, in pres

    Particle tracking in a salinity gradient: A method for measuring sinking rate of individual phytoplankton in the laboratory

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    This paper presents a new method to measure the sinking rates of individual phytoplankton “particles” (cells, chains, colonies, and aggregates) in the laboratory. Conventional particle tracking and high resolution video imaging were used to measure particle sinking rates and particle size. The stabilizing force of a very mild linear salinity gradient (1 ppt over 15 cm) prevented the formation of convection currents in the laboratory settling chamber. Whereas bulk settling methods such as SETCOL provide a single value of sinking rate for a population, this method allows the measurement of sinking rate and particle size for a large number of individual particles or phytoplankton within a population. The method has applications where sinking rates vary within a population, or where sinking rate-size relationships are important. Preliminary data from experiments with both laboratory and field samples of marine phytoplankton are presented here to illustrate the use of the technique, its applications, and limitations. Whereas this paper deals only with sinking phytoplankton, the method is equally valid for positively buoyant species, as well as nonbiological particles

    X-ray Observations of the Broad-Line Radio Galaxy 3C 390.3

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    We present the data and preliminary analysis for a series of 90 ROSAT HRI and two ASCA observations of the broad-line radio galaxy 3C 390.3. These data were obtained during the period 1995 January 2 to 1995 October 6 as part of an intensive multiwavelength monitoring campaign. The soft X-ray flux in the ROSAT band varied by nearly a factor of four during the campaign, and the well-resolved light-curve shows several distinct features. Several large amplitude flares were observed, including one in which the flux increased by a factor of about 3 in 12 days. Periods of reduced variability were also seen, including one nearly 30 days long. While the HRI hardness ratio decreased significantly, it is apparently consistent with that expected due to the detector during the monitoring period. The two ASCA observations were made on 1995 January 15 and 1995 May 5. The 0.5-10.0 keV spectra can be adequately described by an absorbed power-law. There is no evidence for a soft excess in the ASCA spectra, indicating that the ROSAT HRI is sampling variability of the X-ray power-law. A broad iron line was observed in a longer 1993 ASCA observation, and while there is statistical evidence that the line is present in the 1995 spectra, it could not be resolved clearly. There is evidence, significant at >90% confidence, that the photon index changed from 1.7 to 1.82 while the flux increased by 63%. The spectral change can be detected in the spectra below 5 keV, indicating that the origin cannot be a change in ratio of reflected to power-law flux. A compilation of results from ASCA and Ginga observations show that on long time scales the intrinsic photon index is correlated with the flux.Comment: 17 pages using (AASTeX) aaspp4.sty and 4 Postscript figures. Astrophysical Journal, in pres

    Influences on the food choices and physical activity behaviours of overweight and obese pregnant women: A qualitative stud

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    Objective: to qualitatively explore influences identified by overweight/obese pregnant women on food choices and physical activity (PA) behaviours; to determine the impact of pregnancy on these factors; and to inform development of future lifestyle interventions during pregnancy. Design: cross-sectional interview study. Setting: maternity hospital, Ireland. Participants: pregnant women (n=22), early pregnancy Body Mass Index > 25 kg/m2. Measures: barriers to and facilitators of healthy eating and PA in overweight/obese pregnancy. Interviews were transcribed verbatim and analysed using inductive thematic analysis. Findings: overweight/obese women perceived the following factors to influence their food choices and PA behaviours: personal (e.g. age, enjoyment, health, aesthetic appearance, and response to fatigue); social (e.g. social support, food modelling, social facilitation and weight bias) and environmental (e.g. food salience and the obesogenic environment). These factors affected PA and food choice trajectories differently according to socio-economic and socio-cultural context. Conclusion and Implications: personal, social and environmental factors affect food choices and PA behaviours. Pregnancy is a powerful stimulus for positive changes in food choices particularly. This change is driven by desire for healthy pregnancy outcome, and is not intrinsically motivated. Healthy lifestyle interventions should aim to sustain positive changes beyond pregnancy through: empowerment, intrinsic motivation, family-centred approach, and behavioural goals
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